CKA CKA Services and Ingress

Question 1

Which Service type exposes a service only within the Kubernetes cluster on an internal IP?

Accepted Answer

ClusterIP

Answer

ClusterIP is the default service type that assigns an internal cluster IP, making the service reachable only within the cluster.

Question 2

Which Service type exposes an application on a static port on every node's IP?

Accepted Answer

NodePort

Answer

NodePort exposes the service on each Node's IP at a static port in the range 30000–32767.

Question 3

What is the default port range for NodePort services in Kubernetes?

Accepted Answer

30000–32767

Answer

NodePort services allocate ports from the range 30000–32767 by default, configurable via `--service-node-port-range` on the API server.

Question 4

Which Service type automatically provisions an external cloud load balancer?

Accepted Answer

LoadBalancer

Answer

The LoadBalancer service type requests an external load balancer from the cloud provider to route traffic to the service.

Question 5

What does setting `clusterIP: None` on a Service create?

Accepted Answer

A Headless Service for direct pod DNS discovery

Answer

Setting `clusterIP: None` creates a Headless Service that returns individual pod IPs via DNS instead of a single virtual IP.

(CKA) Certified Kubernetes Administrator Practice Test